#include "csapp.h"
int main(int argc,char **argv){
	struct addrinfo *p,*listp,hints;
	char buf[MAXLINE];
	int rc,flags;
	if(argc!=2){//More than one address
		fprintf(stderr,"usage:%s <domain name>\n",argv[0]);
		exit(0);
	}
	memset(&hints,0,sizeof(struct addrinfo));
	hints.ai_family=AF_INET;/* IPv4 only */
	hints.ai_socktype=SOCK_STREAM; /*Connections only*/
	if( ( rc=getaddrinfo(argv[1],NULL,&hints,&listp) )!=0 ){
		fprintf(stderr,"getaddrinfo error:%s\n",gai_strerror(rc));
		exit(1);
	}
	flags=NI_NUMERICHOST;/*Display address string without domain name*/
	for(p=listp;p;p=p->ai_next){
		getnameinfo(p->ai_addr,p->ai_addrlen,buf,MAXLINE,NULL,0,flags);
		printf("%s\n",buf);
	}
	freeaddrinfo(listp);
	exit(0);
}
